Pdftoppm reads the PDF file,
PDF-file,
and writes one PPM file for each page,
PPM-root-nnnnnn.ppm,
where
nnnnnn
is the page number.

CONFIGURATION FILE

Pdftoppm reads a configuration file at startup. It first tries to
find the user's private config file, ~/.xpdfrc. If that doesn't
exist, it looks for a system-wide config file, /etc/xpdf/xpdfrc. See the
xpdfrc(5)
man page for details.

OPTIONS

Many of the following options can be set with configuration file
commands. These are listed in square brackets with the description of
the corresponding command line option.